Want to bet? I think it can be done pretty easily.i dont think anyone can equal the selective pressure of II with selecting the best performing colony. -josethayil
Let's say that I decide I only want cordovan bees. Any colony that has any offspring that do not express cordovan traits gets destroyed immediately by me (my selective program). I do nothing else, no II, nothing. How great is that selective pressure? Is it as great as the selective pressure on my bees if I were to II them and not destroy those that meet my strict expectations?
Don't confuse "efficiency of method of selective breeding" with "selective pressure." The two do differ.
Not exactly. Selection, natural or artificial, removes those that are not adapted to match the selective pressure.natural selection gives a hive all its optons available to survive. -josethayil
Selective forces are also responsible for extinction.
More bees were imported into the U. S. than were imported into eastern Russia. And the bees imported into the U. S. represent Apis mellifera mellifera, A. m. liguistica, A. m. carnica, A. m. caucasica, A. m. scutellata , and Buckfast bees (which are a hybrid of any number of subspecies from around the world), and more. That range of subspecies, even allowing for only a few lines of each, represents a far greater range of genes than the limited number of hives taken to eastern Russia. Oh, and descendents of those bees taken to Primorsky Krai have since been imported into the U. S. and widely distributed by humans here. So, those genes are available here.In US there were only a few hives brought initially and everytime a queen or hive was imported it has gone through human selection which does reduce the gene pool. -josethayil
Don't confuse "genetic diversity," with "phenotypes worth conserving." Some of the most unique phenotypes, maybe some of those most worth conserving, are actually the result of limited genetic diversity.
Not so. Natural selection does no such thing. Natural selection tends to eliminate genes (genetics) in favor of those few that are most evolutionarily fit.Natural selection always preserves as mmuch genetics as possible. . . -josethayil
Natural selection can act very, very rapidly. Natural selection can also be responsible for extinctions (which clearly do not preserve genetics), and natural selection can be more or less efficient than "human selection." The strength of the selective pressure is key here. Think of it in terms of human selection: if you aren't completely ruthless in selecting breeding characteristics, the selective pressure that you're putting on your bees isn't as great, and isn't likely to act as rapidly or as completely as if you are completely ruthless. Strength of natural selection can vary, too, from weak pressures to extremely strong pressures.